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<td ><a href="../qtdoc/index.html">Qt 5.12</a></td><td ><a href="qtquick-index.html">Qt Quick 模块</a></td><td ><a href="qtquick-qmlmodule.html">QML类型</a></td><td >PathCurve QML 类型</td></tr></table><table class="buildversion"><tr>
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<li class="level1"><a href="#properties">属性</a></li>
<li class="level1"><a href="#details">详细信息</a></li>
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<h1 class="title">PathCurve QML 类型</h1>
<span class="subtitle"></span>
<!-- $$$PathCurve-brief -->
<p>Defines a point on a Catmull-Rom curve. <a href="#details">更多...</a></p>
<!-- @@@PathCurve -->
<div class="table"><table class="alignedsummary">
<tr><td class="memItemLeft rightAlign topAlign"> 导入语句：</td><td class="memItemRight bottomAlign"> import QtQuick 2.12</td></tr></table></div><ul>
<li><a href="qml-qtquick-pathcurve-members.html">所有成员的列表，包括继承成员</a></li>
</ul>
<a name="properties"></a>
<h2 id="properties">属性</h2>
<ul>
<li class="fn"><b><b><a href="qml-qtquick-pathcurve.html#relativeX-prop">relativeX</a></b></b> : real</li>
<li class="fn"><b><b><a href="qml-qtquick-pathcurve.html#relativeY-prop">relativeY</a></b></b> : real</li>
<li class="fn"><b><b><a href="qml-qtquick-pathcurve.html#x-prop">x</a></b></b> : real</li>
<li class="fn"><b><b><a href="qml-qtquick-pathcurve.html#y-prop">y</a></b></b> : real</li>
</ul>
<!-- $$$PathCurve-description -->
<a name="details"></a>
<h2 id="details">详细信息</h2>
<p><a href="qml-qtquick-pathcurve.html">PathCurve</a> provides an easy way to specify a curve passing directly through a set of points. Typically multiple PathCurves are used in a series, as the following example demonstrates:</p>
<pre class="qml">

  import QtQuick 2.0

  <span class="type"><a href="qml-qtquick-canvas.html">Canvas</a></span> {
      <span class="name">width</span>: <span class="number">400</span>; <span class="name">height</span>: <span class="number">200</span>
      <span class="name">contextType</span>: <span class="string">&quot;2d&quot;</span>

      <span class="type"><a href="qml-qtquick-path.html">Path</a></span> {
          <span class="name">id</span>: <span class="name">myPath</span>
          <span class="name">startX</span>: <span class="number">0</span>; <span class="name">startY</span>: <span class="number">100</span>

          <span class="type"><a href="qml-qtquick-pathcurve.html">PathCurve</a></span> { <span class="name">x</span>: <span class="number">75</span>; <span class="name">y</span>: <span class="number">75</span> }
          <span class="type"><a href="qml-qtquick-pathcurve.html">PathCurve</a></span> { <span class="name">x</span>: <span class="number">200</span>; <span class="name">y</span>: <span class="number">150</span> }
          <span class="type"><a href="qml-qtquick-pathcurve.html">PathCurve</a></span> { <span class="name">x</span>: <span class="number">325</span>; <span class="name">y</span>: <span class="number">25</span> }
          <span class="type"><a href="qml-qtquick-pathcurve.html">PathCurve</a></span> { <span class="name">x</span>: <span class="number">400</span>; <span class="name">y</span>: <span class="number">100</span> }
      }

      <span class="name">onPaint</span>: {
          <span class="name">context</span>.<span class="name">strokeStyle</span> <span class="operator">=</span> <span class="name">Qt</span>.<span class="name">rgba</span>(<span class="number">.4</span>,<span class="number">.6</span>,<span class="number">.8</span>);
          <span class="name">context</span>.<span class="name">path</span> <span class="operator">=</span> <span class="name">myPath</span>;
          <span class="name">context</span>.<span class="name">stroke</span>();
      }
  }

</pre>
<p>This example produces the following path (with the starting point and <a href="qml-qtquick-pathcurve.html">PathCurve</a> points highlighted in red):</p>
<p class="centerAlign"><img src="images/declarative-pathcurve.png" alt="" /></p><p><b>请参考</b> <a href="qml-qtquick-path.html">Path</a>, <a href="qml-qtquick-pathline.html">PathLine</a>, <a href="qml-qtquick-pathquad.html">PathQuad</a>，<a href="qml-qtquick-pathcubic.html">PathCubic</a>，<a href="qml-qtquick-patharc.html">PathArc</a> 和 <a href="qml-qtquick-pathsvg.html">PathSvg</a>。</p>
<!-- @@@PathCurve -->
<h2>属性文档</h2>
<!-- $$$relativeX -->
<div class="qmlitem"><div class="qmlproto">
<div class="table"><table class="qmlname">
<tr valign="top" class="odd" id="relativeX-prop">
<td class="tblQmlPropNode"><p>
<a name="relativeX-prop"></a><span class="name">relativeX</span> : <span class="type"><a href="../qtqml/qml-real.html">real</a></span></p></td></tr>
</table></div>
</div><div class="qmldoc"><p>Defines the end point of the curve relative to its start.</p>
<p>If both a relative and absolute end position are specified for a single axis, the relative position will be used.</p>
<p>Relative and absolute positions can be mixed, for example it is valid to set a relative x and an absolute y.</p>
<p><b>请参考 </b><a href="qml-qtquick-pathcurve.html#x-prop">x</a> 和 <a href="qml-qtquick-pathcurve.html#y-prop">y</a>。</p>
</div></div><!-- @@@relativeX -->
<br/>
<!-- $$$relativeY -->
<div class="qmlitem"><div class="qmlproto">
<div class="table"><table class="qmlname">
<tr valign="top" class="odd" id="relativeY-prop">
<td class="tblQmlPropNode"><p>
<a name="relativeY-prop"></a><span class="name">relativeY</span> : <span class="type"><a href="../qtqml/qml-real.html">real</a></span></p></td></tr>
</table></div>
</div><div class="qmldoc"><p>Defines the end point of the curve relative to its start.</p>
<p>If both a relative and absolute end position are specified for a single axis, the relative position will be used.</p>
<p>Relative and absolute positions can be mixed, for example it is valid to set a relative x and an absolute y.</p>
<p><b>请参考 </b><a href="qml-qtquick-pathcurve.html#x-prop">x</a> 和 <a href="qml-qtquick-pathcurve.html#y-prop">y</a>。</p>
</div></div><!-- @@@relativeY -->
<br/>
<!-- $$$x -->
<div class="qmlitem"><div class="qmlproto">
<div class="table"><table class="qmlname">
<tr valign="top" class="odd" id="x-prop">
<td class="tblQmlPropNode"><p>
<a name="x-prop"></a><span class="name">x</span> : <span class="type"><a href="../qtqml/qml-real.html">real</a></span></p></td></tr>
</table></div>
</div><div class="qmldoc"><p>Defines the end point of the curve.</p>
<p><b>请参考 </b><a href="qml-qtquick-pathcurve.html#relativeX-prop">relativeX</a> 和 <a href="qml-qtquick-pathcurve.html#relativeY-prop">relativeY</a>。</p>
</div></div><!-- @@@x -->
<br/>
<!-- $$$y -->
<div class="qmlitem"><div class="qmlproto">
<div class="table"><table class="qmlname">
<tr valign="top" class="odd" id="y-prop">
<td class="tblQmlPropNode"><p>
<a name="y-prop"></a><span class="name">y</span> : <span class="type"><a href="../qtqml/qml-real.html">real</a></span></p></td></tr>
</table></div>
</div><div class="qmldoc"><p>Defines the end point of the curve.</p>
<p><b>请参考 </b><a href="qml-qtquick-pathcurve.html#relativeX-prop">relativeX</a> 和 <a href="qml-qtquick-pathcurve.html#relativeY-prop">relativeY</a>。</p>
</div></div><!-- @@@y -->
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